diff --git a/lib/PgSQL_Thread.cpp b/lib/PgSQL_Thread.cpp
index 9aab0dc1e..f6bac71a8 100644
--- a/lib/PgSQL_Thread.cpp
+++ b/lib/PgSQL_Thread.cpp
@@ -2057,7 +2057,7 @@ char** PgSQL_Threads_Handler::get_variables_list() {
 	// initialize VariablesPointers_int
 	// it is safe to do it here because get_variables_list() is the first function called during start time
 	if (VariablesPointers_int.size() == 0) {
-		VariablesPointers_int["authentication_method"] = make_tuple(&variables.authentication_method, 0, 4, false);
+		VariablesPointers_int["authentication_method"] = make_tuple(&variables.authentication_method, 1, 3, false);
 		// Monitor variables
 		VariablesPointers_int["monitor_history"] = make_tuple(&variables.monitor_history, 1000, 7 * 24 * 3600 * 1000, false);